Quantum Dimer Model on the triangular lattice: Semiclassical and variational approaches to vison dispersion and condensation

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dc.creatorMisguich, Gregoire
dc.creatorMila, Frederic
dc.date2007-12-07
dc.date2008-02-19
dc.date.accessioned2026-07-07T09:40:45Z
dc.date.available2026-07-07T09:40:45Z
dc.descriptionAfter reviewing the concept of vison excitations in Z_2 dimer liquids, we study the liquid-crystal transition of the Quantum Dimer Model on the triangular lattice by means of a semiclassical spin-wave approximation to the dispersion of visons in the context of a "soft-dimer" version of the model. This approach captures some important qualitative features of the transition: continuous nature of the transition, linear dispersion at the critical point, and \sqrt{12}x\sqrt{12} symmetry-breaking pattern. In a second part, we present a variational calculation of the vison dispersion relation at the RK point which reproduces the qualitative shape of the dispersion relation and the order of magnitude of the gap. This approach provides a simple but reliable approximation of the vison wave functions at the RK point.
dc.description12 pages, 10 figures. v2: minor changes, to appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0712.1102
dc.identifierhttp://arxiv.org/abs/0712.1102
dc.identifierPhys. Rev. B 77, 134421 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.134421
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161586
dc.subjectStrongly Correlated Electrons
dc.titleQuantum Dimer Model on the triangular lattice: Semiclassical and variational approaches to vison dispersion and condensation
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